81 x 9 = 801. What must you do to make the this equation true?

Can you decipher these quotes by Albert Einstein?
Blf xzm mvevi hloev z kilyovn lm gsv ovevo lm dsrxs rg dzh xivzgvw.

What does this rebus mean?

O
N
C
E
TIME

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

If 21x = 79x, what is the value of x?

He runs but never walks. Murmurs, but never talks. Has a bed, but never sleeps. And has a mouth, but never eats?

You are in a room that has three switches and a closed door. The switches control three light bulbs on the other side of the door. Once you open the door, you may never touch the switches again. How can you definitively tell which switch is connected to each of the light bulbs?

Client Dempsey living in one of the East Coast states of the U.S. was talking to Landon Donovan, who was living in the West Coast state of the U.S.

Dempsey: What time is it?
Donovan: Wow, It is the same time here.

How is this possible?

How can you make a TV, a bed, a dog, and a car liquid?

What word is identified by the below rebus?

Your Your Your Your Your
Your Your Your Your Your